CN1965495A - Radiating device comprising at least one adaptive rejection filter and antenna provided with said device - Google Patents
Radiating device comprising at least one adaptive rejection filter and antenna provided with said device Download PDFInfo
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- CN1965495A CN1965495A CNA2005800188081A CN200580018808A CN1965495A CN 1965495 A CN1965495 A CN 1965495A CN A2005800188081 A CNA2005800188081 A CN A2005800188081A CN 200580018808 A CN200580018808 A CN 200580018808A CN 1965495 A CN1965495 A CN 1965495A
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- 230000005855 radiation Effects 0.000 claims description 29
- 238000012937 correction Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 abstract 3
- 230000006870 function Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
Abstract
The invention relates to an antenna comprising at least one radiating device (100) which is provided with a rejection filter associated with the frequency band of an interfering signal. The inventive antenna is characterised in that the rejection filter is adaptive in such a way that it is activated when the interfering signal is detected and the power thereof is greater than a threshold and said adaptive filter is deactivated when the detected power signal of the interfering signal is less than the threshold.
Description
Technical field
The present invention relates to comprise radiation device of a kind of at least one self adaptation rejection filter (rejector filter) and the antenna that comprises this equipment.Particularly, the present invention is applied to use in the radio communication of high frequency.
Background technology
Nowadays, there is the wireless communication technology that much is used for digital data transfer.Most of conventional arts are by these modulates digital data high frequency carriers.
Subsequently, amplify resulting signal, send it to transmitting antenna then.When receiving, carry out opposite operation.
Have the out of Memory transmission technology, specifically, depend on the technology of emission of the Gaussian pulse string of very short duration (500ps level), the reproduction of wherein said Gaussian pulse string is checked exactly.The useful information that will send is included in the differentiation (evolution) in the cycle between the continuous impulse.
This communication technology is called as pulse position modulation (PPM).It allows to carry out carrierfree (carrier-less) data with low relatively transmitting power (less than 1 milliwatt) with high-throughput and sends, and the waveform of employed pulse causes having at frequency domain the signal of the wave band of non-constant width.
Standardisation bodies is just being set up UWB (" ultra broadband ") standard at present on the basis of this PPM technology.
These groups have adopted limitation standard on the two in that institute's emitted power grade and frequency are congested, so that reduce the possibility of disturbing the mass communication device of having disposed.
Therefore, the frequency range of reserving for the UWB radio communication is restricted to [3.1GHz; 10.6GHz], and maximum equivalent isotropically radiated power (ERIP) is-41dBm/Mhz promptly to be-2.25dBm on the bandwidth that is allowed.
But using specifically, serious problems have appearred in some wireless transmitting system of the part of the frequency band that is distributed between 5GHz and 6GHz.
Therefore, other standard, specifically Hyperlan2 and 802.11a have the frequency band of following distribution:
In Europe ,-[5.15GHz; 5.35GHz] and [5.47GHz; 5.725GHz],
In the U.S. ,-[5.15GHz; 5.35GHz] and [5.725GHz; 5.825GHz],
In Japan ,-[5.15GHz; 5.35GHz].
Because such system can show than the much bigger signal power of standardization power in the UWB standard, therefore for the UWB receiver, they are potential intruders.
Because these intruders are with respect to UWB equipment emission interference signal and reduce their passband, so these intruders are with respect to these equipment but disadvantageous (penalizing).
Specifically, when having this EVAC (Evacuation Network Computer Model), amplifier with lower powered signal of UWB equipment (being called as LNA, i.e. the initial of representative " low noise amplifier ") and analog signal are saturated to the transducer (being called as ADC) of digital signal.This makes can not correctly detect the UWB pulse.
Know, be used for to exist the rejection filter of the frequency band of interference to come some frequency is carried out filtering, so that protection is at the equipment of receiving terminal or forbid that the equipment emission is not so that disturb already present communication.
Summary of the invention
The present invention comes from the distinctive discovery of the present invention, finds that according to this these rejection filters reduce the passband of their associated equipment enduringly, and interference signal is not necessarily sustained or not even existence.
The present invention has solved the problems referred to above at least, even that is: when not having interference signal, rejection filter is continued presence and reducing unfriendly with the corresponding passband of this filter thus also.
The present invention relates to a kind of antenna that comprises a radiation device at least, described radiation device is equipped with the rejection filter that is associated with the frequency band of interference signal, it is characterized in that, this rejection filter is adaptive, so that it is effective when detecting interference signal and its power and exceed threshold value, and when the power of detected this interference signal is lower than threshold value, this sef-adapting filter was lost efficacy.
Utilize the present invention, only when power that detects the interference signal that exceeds certain threshold value or intensity, just activate the rejection filter of antenna in dynamic and adaptive mode.
This antenna provides the advantage that is protected in the case and does not disturb mutually with interference signal when emission when receiving.
Specifically, avoided saturated to the transducer of digital signal of when having interference signal analog signal.
In addition, this antenna also presents the advantage that when not having interference signal its passband is restricted.
In fact, when not having interference signal,, rejection filter was lost efficacy and do not reduce the passband of antenna if perhaps the intensity of this signal rolls back and is lower than certain threshold value.
Rejection filter can be integrated in the antenna, thereby cause the antenna compactness of limited insertion loss, raising and the antenna cost of reduction.
The present invention eliminated with in antenna and analog signal integrated relevant noise factor (noise factor) problem to the filter between the transducer of digital signal.
In an embodiment, antenna can receive or send [3.1GHz; 10.6GHz] frequency band in signal.
According to embodiment, in radiation device, rejection filter comprises at least one non-conductive parts.
In an embodiment, described non-conductive parts have such size, wish that if described size equals to detect interference signal filtering is to receive or to wish to protect with the centre wavelength of the interference signal that sends half.
According to embodiment, the switching device of the conductive edge (edge) by linking non-conductive parts comes the non-conductive parts of bridge joint (bridge).
In an embodiment, described switching device comprises diode or electro-mechanical system.
According to embodiment, the checkout gear of interference signal is associated with antenna.
In an embodiment, checkout gear comprises at least one comparator, is used for the level (level) of interference signal and the threshold that joins with this signal correction.
According to embodiment, the control device of switching device is associated with antenna.
In an embodiment, when the power of interference signal surpassed the threshold value of the connection of signal correction therewith, control device disconnected interference signal associated switch arrangement therewith.
According to embodiment, when the power of certain interference signal drops to the threshold value of the connection of signal correction therewith when following, the control device closure is the interference signal associated switch arrangement therewith.
In an embodiment, on printed circuit, realize antenna.
According to embodiment, described radiation device is the dipole antenna (dipole) that comprises two radiant elements.
In an embodiment, described radiant element has circle or oval in shape.
According to embodiment, radiation device comprises at least two rejection filters.
The invention still further relates to a kind of radiation device that is equipped with rejection filter, it is characterized in that: this rejection filter is adaptive, so that realize this rejection filter in according to the antenna of one of previous embodiment.
Description of drawings
By the description that provides below as non-limitative example in reference to the accompanying drawings, other features and advantages of the present invention will display, in the accompanying drawings:
Fig. 1 a represents the embodiment according to the radiation device of antenna of the present invention;
Fig. 1 b, 1c and 1d represent the emulation according to the standing-wave ratio of radiation device of the present invention;
Fig. 2 graphic representation is according to the switching device of equipment of the present invention; And
Fig. 3 graphic representation is according to checkout gear that is associated with antenna of the present invention and control device.
Embodiment
Fig. 1 represents the embodiment according to the radiation device 100 of antenna of the present invention.In this embodiment, radiation device 100 comprises dipole antenna.This broadband radiation equipment 100 comprises two round arms 106 and 107.
The diameter of circle arm is 24mm, and their be separated from each other distances of 1mm.These circle arms are made by electric conducting material or are covered by electric conducting material.
Realize the supply (feed) of these circle arms by tie point 126 and 128.
First is positioned at around the frequency of 4.6GHz: it is called as low-frequency filter or LF filter.
This filter is made by two non-conductive parts 104 and 110, and each has the length of 32mm and the width of 0.5mm.
By disconnecting or closed LF switching device 116 and 122 comes these two non-conductive parts 104 of bridge joint and 110.If these LF switching devices 116 and 122 disconnect, these LF switching devices 116 and 122 not conductings so, and the LF rejection filter is effective around the frequency of 4.6GHz.
If these LF devices 116 and 122 are closed, these LF switching devices 116 and 122 conductings so, thus the 4.6GHz rejection filter is disappeared.
Second rejection filter is positioned at around the frequency of 5.7GHz: it is called as high frequency filter or HF filter.It comprises two non-conductive parts 102 and 108, and each has 26mm length and 0.4mm width.
By disconnecting or closed HF switching device 118 and 120 comes these two non-conductive parts 102 of bridge joint and 108.If these HF switching devices 118 and 120 disconnect, these HF switching devices 118 and 120 not conductings so, and the HF rejection filter is effective around the frequency of 5.7GHz.
If these HF switching devices 118 and 120 are closed, these HF switching devices 118 and 120 conductings so, thus the 5.7GHz rejection filter is disappeared.
When HF device 118 and 120 and LF device 116 and 122 when being closed (be also referred to as effectively), these two rejection filters were lost efficacy, and radiation device 100 shows as the not dipole antenna of band rejection filter (particularly, not with non-conductive parts 102,104,108 or 110).
When LF device 116 and 122 closures and HF device 118 and 120 disconnections (it is invalid to be also referred to as), rejection filter is gone up effectively at high frequency (approximately 5.7GHz) so.
When LF device 116 and 122 disconnections and HF device 118 and 120 closures, rejection filter is gone up effectively at low frequency (approximately 4.6GHz) so.
When LF device 116 and 122 disconnects and HF device 118 and 120 when disconnecting, rejection filter is gone up effectively and rejection filter is gone up effectively at high frequency (approximately 5.7GHz) at low frequency (approximately 4.6GHz) so.
Each comprises that at least one diode, micro-electromechanical system or any other can be controlled to disconnect or the system of closed (that is, being respectively not conducting or conducting) LF device 116, LF device 122, HF device 118 and HF device 120.
Verify all these results by emulation.Fig. 1 b, 1c and 1d are the result's that obtained examples.
Fig. 1 b is Figure 130, it is given on the frequency range of [2GHz-12GHz], as the curve of the standing-wave ratio that is called as VSWR (" voltage standing wave ratio ") (as ordinate 132) of equipment 100 of Fig. 1 a of function that with GHz is the frequency (as abscissa 134) of unit.
Curve 136 is to utilize the not curve of the radiation device acquisition of band rejection filter.
Curve 138 is to have utilized non-metallic parts 102,104,108 integrated and curve that 110 radiation device 100 obtains, and switching device 116,118,120 and 122 is closed (being also referred to as conducting).
Attention: these two curves are overlapping, thereby show the rejection filter of having removed radiation device 100 fully.So equipment 100 shows as the radiation device of not being with non-metallic component.Therefore, when its rejection filter was lost efficacy, this equipment 100 was not subjected to passband loss, thereby the antenna of integrated this equipment 100 is not subjected to passband loss.
Fig. 1 c represents Figure 140, it disconnects under the situation of (being also referred to as not conducting) at switching device 116,118,120 and 122, with with the similar mode of Fig. 1 b, provide as being that the VSWR of function of frequency (as abscissa 134) of unit is than (as ordinate 132) with GHz.
Attention is for sizable value of the VSWR ratio of the narrow frequency range 142 around value 4.6GHz and the 5.7GHz and 144, thereby comprises the strong prevention (rejection) to these scopes 142 and 144.
Therefore, these two rejection filters are carried out its prevention function for frequency range 142 and 144.
Fig. 1 d is Figure 150, and it has provided:
-disconnect for LF switching device 116 and 122, as with GHz be unit frequency (as abscissa 134) function VSWR than the curve 152:LF rejection filter of (as ordinate 132) around the frequency of 4.6GHz effectively, and in the narrow wave band 156 around the 4.6GHz, VSWR is bigger than quite.
-disconnect ( LF switching device 116 and 122 closures) for HF switching device 118 and 120, as with GHz be unit frequency (as abscissa 134) function VSWR than the curve 154:HF rejection filter of (as ordinate 132) around the frequency of 5.7GHz effectively, and in the narrow wave band 158 around the 5.7GHz, the VSWR ratio is quite big.
Therefore, this emulation makes and can confirm the independent possibility that activates LF rejection filter or HF rejection filter.
Fig. 2 is the graphic representation of embodiment of the switching device of the radiation device embodiment on the printed circuit.
Therefore, with two round arm etchings of radiation device from the teeth outwards.A part is non-metallic so that produce rejection filter.
In this embodiment, mounted on surface diode 200 bridge joints that are soldered to first metal parts 202 of round arm and second metal parts 204 have the non-metallic parts 206 of dielectric constant eR.
This channel width 210 forbids controlling the necessary continuous current transmission of diode, and described continuous current transmission can arrive and may disturb the operation of diode by metal parts 208.
But this channel width 210 allows high-frequency signal to pass through.Another may embodiment be to place capacitor in position between metal parts 208 and 204, and these capacitors can play same function.
The DC that guarantees diode by through hole 212 and circuit 214 supplies with.
Fig. 3 graphic representation is according to checkout gear 302 that is associated with radiation device 300 of the present invention and control device 304.
The signal that derives from equipment 300 is sent to the amplifier 306 that is called as LNA (" low noise amplifier " promptly improves the amplifier of signal to noise ratio).
Subsequently, be delivered to such as the equipment 300 distinctive signals of UWB signal and make recovering information become in the possible correlator 308, be delivered to then in the analog to digital converter 310.
Subsequently, in management devices 312 in base band processing said data so that data 314 to be provided.
In addition, the device 302 that is used to detect interference signal also is connected to the output of LNA306.These checkout gears 302 are included in one group of filter 318 and 320 of the number (this number equals 2 in this embodiment) that equals to be present in the rejection filter in the radiant element on the number.These filters 318 and each analysis of 320 are called as the frequency of the frequency that will monitor, wherein for described frequency, anticipate interference signal and created rejection filter in equipment 300.
If the power of interference signal is lower than this threshold value 330, do not take action so.If surpass threshold value 330 for one or more these power of the frequency that will monitor, checkout gear is communicated to control device 304 with this information so, so that go up the corresponding switching device of disconnection in the level (level) of equipment 300.
If this power drops to threshold value below 330 subsequently, checkout gear is communicated to control device 304 with this information so, so that closed corresponding switching device.
These control device comprise PROM (" programmable read only memory ") memory 316.
Another incoming end (access) of each switching device is connected to the metal parts of the round arm of dipole antenna, and is linked to prom memory by ground wire (earth line).
Therefore, each arm of this specific embodiment uses two control lines to add a ground wire, i.e. six lines altogether.
This invention can be revised as a plurality of modification.Particularly, the number of rejection filter be variable (have only one, as described above two among the embodiment or greater than two).
In addition, the shape of filter is variable.The round-shaped of the foregoing description only is a kind of possibility.Specifically, can be used as integrated some filters requirement function and realize the present invention with other shape.
Can when receiving, use this scheme to avoid information dropout, also can use this scheme to eliminate specific selection in advance or switchable frequency band when emission, wherein said frequency band may be subjected to being disturbed by the signal that radiation device and more extensive theory are launched by antenna.
Claims (16)
1. antenna that comprises at least one radiation device (100,300), described radiation device (100,300) has the rejection filter that is associated with the frequency band of interference signal, it is characterized in that: this rejection filter is adaptive, so that when detecting interference signal and its power above threshold value (330), this rejection filter is effectively, when the power of this interference signal that is detected is lower than threshold value (330), this rejection filter was lost efficacy.
2. antenna according to claim 1 is characterized in that: it can receive or be sent in [3.1GHz; 10.6GHz] frequency band in signal.
3. antenna according to claim 1 and 2 is characterized in that: at least one radiation device (100,300), rejection filter comprises at least one non-conductive parts (102,104,108,110,206).
4. antenna according to claim 3; it is characterized in that: described non-conductive parts (102,104,108,110,206) have such size, wish that if described size equals to detect interference signal filtering is to receive or to wish to protect with the centre wavelength of the interference signal that sends half.
5. according to claim 3 or 4 described antennas, it is characterized in that: the switching device (116,118,120,122) of the conductive edge by linking described non-conductive parts (102,104,108,110,206) comes the described non-conductive parts of bridge joint (102,104,108,110,206).
6. antenna according to claim 5 is characterized in that: switching device (116,118,120,122) comprises diode (200) or electro-mechanical system.
7. according to claim 1,2,3,4,5 or 6 described antennas, it is characterized in that: the checkout gear of interference signal (302) is associated with described antenna.
8. antenna according to claim 7 is characterized in that: checkout gear (302) comprises at least one comparator (324,326), be used for the level of interference signal and therewith the threshold value (330) of signal correction connection compare.
9. according to the described antenna in one of claim 5 or 6, it is characterized in that: the control device (304) of switching device (116,118,120,122) is associated with described antenna.
10. antenna according to claim 9 is characterized in that: when the power of interference signal surpassed the threshold value (330) of the connection of signal correction therewith, control device (304) disconnected interference signal associated switch arrangement (116,118,120,122) therewith.
11. antenna according to claim 9, it is characterized in that: when the power of interference signal drops to the threshold value (330) of the connection of signal correction therewith when following, control device (304) closure is interference signal associated switch arrangement (116,118,120,122) therewith.
12., it is characterized in that: on printed circuit, realize described antenna according to the described antenna of one of aforementioned claim.
13. according to the described antenna of one of aforementioned claim, it is characterized in that: described radiation device (100,300) is the dipole antenna (100) that comprises two radiant elements (106,107).
14. according to the described antenna of one of aforementioned claim, it is characterized in that: described radiant element (106,107) has circle or elliptical shape.
15. according to the described antenna of one of aforementioned claim, it is characterized in that: described radiation device (100,300) comprises at least two rejection filters.
16. a radiation device (100,300) that is equipped with rejection filter, it is characterized in that: described rejection filter is adaptive, so that realize this rejection filter in the described antenna according to one of aforementioned claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0451147 | 2004-06-09 | ||
| FR0451147 | 2004-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1965495A true CN1965495A (en) | 2007-05-16 |
Family
ID=34945071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800188081A Pending CN1965495A (en) | 2004-06-09 | 2005-06-07 | Radiating device comprising at least one adaptive rejection filter and antenna provided with said device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070242785A1 (en) |
| EP (1) | EP1754315B1 (en) |
| JP (1) | JP4939415B2 (en) |
| CN (1) | CN1965495A (en) |
| BR (1) | BRPI0511634A (en) |
| WO (1) | WO2005125034A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103081223A (en) * | 2011-02-10 | 2013-05-01 | 松下电器产业株式会社 | Antenna device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007138960A1 (en) | 2006-05-25 | 2007-12-06 | Panasonic Corporation | Variable slot antenna and method for driving same |
| CN101401262B (en) | 2006-05-25 | 2012-10-10 | 松下电器产业株式会社 | Variable slot antenna and method for driving same |
| EP2128928A1 (en) | 2008-05-28 | 2009-12-02 | Nederlandse Centrale Organisatie Voor Toegepast Natuurwetenschappelijk Onderzoek TNO | An electromagnetic limiter and a use of an electromagnetic limiter |
| TW201014041A (en) * | 2008-09-18 | 2010-04-01 | Univ Tatung | Ultra wideband antenna with a band notched characterisitcs |
| JP4922339B2 (en) * | 2009-04-17 | 2012-04-25 | 三菱電線工業株式会社 | Broadband antenna |
| US11356127B2 (en) | 2019-12-16 | 2022-06-07 | Hewlett Packard Enterprise Development Lp | Selective filtering for continuous 5 GHz and 6 GHz operation of a network device |
| US11476824B2 (en) | 2020-07-09 | 2022-10-18 | Hewlett Packard Enterprise Development Lp | Selective filtering for continuous 5 GHz and 6 GHz operation of a network device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5974101A (en) * | 1992-04-28 | 1999-10-26 | Canon Kabushiki Kaisha | Spread spectrum modulation communication apparatus for narrow band interference elimination |
| JPH06164208A (en) * | 1992-11-16 | 1994-06-10 | Fujitsu Ltd | Composite filter |
| JPH06315018A (en) * | 1993-04-28 | 1994-11-08 | Onkyo Corp | Spread spectrum receiver |
| JPH0983239A (en) * | 1995-09-08 | 1997-03-28 | Matsushita Electric Ind Co Ltd | Plane antenna |
| US6807405B1 (en) * | 1999-04-28 | 2004-10-19 | Isco International, Inc. | Method and a device for maintaining the performance quality of a code-division multiple access system in the presence of narrow band interference |
| JP2001189615A (en) * | 1999-10-18 | 2001-07-10 | Matsushita Electric Ind Co Ltd | Antenna for mobile radio and portable radio equipment using the same |
| US6774859B2 (en) | 2001-11-13 | 2004-08-10 | Time Domain Corporation | Ultra wideband antenna having frequency selectivity |
| US6864848B2 (en) * | 2001-12-27 | 2005-03-08 | Hrl Laboratories, Llc | RF MEMs-tuned slot antenna and a method of making same |
| US20050174294A1 (en) * | 2002-05-31 | 2005-08-11 | The Regents Of The University Of Michigan | Switchable slot antenna |
| JP4206045B2 (en) * | 2004-01-28 | 2009-01-07 | 株式会社ワイケーシー | Bandpass filter for differential signal and multi-frequency antenna including a plurality of the same |
-
2005
- 2005-06-07 US US11/628,603 patent/US20070242785A1/en not_active Abandoned
- 2005-06-07 BR BRPI0511634-1A patent/BRPI0511634A/en not_active IP Right Cessation
- 2005-06-07 CN CNA2005800188081A patent/CN1965495A/en active Pending
- 2005-06-07 EP EP05761139.4A patent/EP1754315B1/en not_active Expired - Fee Related
- 2005-06-07 WO PCT/EP2005/052618 patent/WO2005125034A1/en not_active Application Discontinuation
- 2005-06-07 JP JP2007526422A patent/JP4939415B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103081223A (en) * | 2011-02-10 | 2013-05-01 | 松下电器产业株式会社 | Antenna device |
| US9088076B2 (en) | 2011-02-10 | 2015-07-21 | Panasonic Intellectual Property Management Co., Ltd. | Antenna device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1754315A1 (en) | 2007-02-21 |
| US20070242785A1 (en) | 2007-10-18 |
| BRPI0511634A (en) | 2008-01-02 |
| WO2005125034A1 (en) | 2005-12-29 |
| JP2008502243A (en) | 2008-01-24 |
| EP1754315B1 (en) | 2014-08-06 |
| JP4939415B2 (en) | 2012-05-23 |
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